The current Solar System map has two kuiper belt objects that are still using their original numerical names. I guess that since the map was originally made the scientists decided on the actual names, because I looked them up and found them.

136472 is now called Makemake, after the creator of humanity and god of fertility in the mythos of the Rapanui, the native people of Easter Island. And 136108 is now Haumea, after the matron goddess of the island of Hawai'i.

Just thought I should bring this to the attention of the map making community. I'm a big fan of the map, I just felt it should be properly up to date.